Research Article

Determination of Hydraulic Properties of a Large Self-Propped Hydraulic Fracture in the Geothermal Research Borehole Horstberg Z1 in the Northwest German Basin

Figure 3

Conceptual model for the test evaluation. White areas in the Detfurth and Solling: flow channels with infinitely high hydraulic conductivity. Black arrows illustrate fracture-linear flow in the fracture and formation linear flow in the Detfurth and Solling. TD, SD, TS, SS, Tf, Sf: transmissivity and storage coefficient of the Detfurth, Solling and fracture, respectively.